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2023-06-09Product News
Types and specifications of threaded pipes for oil pipes
casing pipe is a deep machining product with high requirements and large consumption in petroleum drilling and production engineering. Use threads to connect a single oil casing into a long pipe string that can withstand hundreds of atmospheres of thousands of meters—a tubular high-pressure vessel. In 1924, API formulated the first oil well pipe standard. The thread of the oil casing pipe joint is a V-shaped thread with 10 threads per inch and 8 threads per inch, but it was later replaced by API8 round thread and partial ladder thread, and it is still in use today. The API SPEC 5B standard stipulates that the commonly used casing threads are round thread (abbreviated as CSG) and buttress thread (abbreviated as BCSG).
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2023-06-09Product News
Oil casing pipe grade
There are 20 different steel grades and types of oil casings in H40, J55, K55, M65, N80, L80, C90, T95, C95, P110, Q125, in order to distinguish different steel grade strengths and thread types , using different color codes and symbols to represent the oil, steel grade and thread of the casing. The two or three digits behind the color code and the English letter indicate the minimum yield strength of the steel grade of the oil and casing, such as J55, which indicates that the minimum yield strength is 55,000 pounds/inch 2 (379Mpa) and the highest is 80,000 pounds/inch 2 ( 552Mpa), the minimum yield strength of P110 is 110,000 lbs/inch 2 (758Mpa) and the highest is 140,000 lbs/in 2 (965Mpa). H, J, K, N represent general strength oil casings, C, L, M, T represent limited yield strength oil casings, which have certain sulfur corrosion resistance.
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2023-06-08Product News
API-SPEC-5D Drill pipe specifications
API-SPEC-5D Drill pipe specifications
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2023-06-08Product News
Difference between API 5DP drill pipe and API 5D drill pipe
The difference between API 5DP and API 5D (pipe body and weld)
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2023-06-07Product News
Oil drill collar
Drill collars are an important part of the drill string during oil drilling. Drill collars are located in the lower part of the drill string and are connected to the drill bit. In addition to transmitting torque, the weight on bit is also stroked to allow the bit to penetrate. During use, the drill collar is subject to environmental stress corrosion and alternating bending fatigue stress are the main factors causing failure and damage. In recent years, due to the continuous occurrence of fracture events of oil drill collars, it has attracted great attention from relevant parties.
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2023-06-07Product News
Oil Casing pipe
Petroleum casing is a steel pipe used to support the walls of oil and gas wells to ensure the normal operation of the entire oil well after the drilling process and completion. Each well uses several layers of casing according to different drilling depths and geological conditions. Cement cementing is used after the casing is lowered into the well. Unlike oil pipes and drill pipes, it cannot be reused and is a one-time consumable material. Therefore, the consumption of casing accounts for more than 70% of all oil well pipes. Casing can be divided into: conduit, surface casing, technical casing and oil layer casing according to the usage.
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2023-06-07Product News
API 5L Line Pipe Specification Sheet
API 5L Line Pipe American Petroleum Institute Standard (API SPEC 5L ) Line Pipe Specification Table
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2023-06-06Product News
Oil casing production process
United Steel Industry Co.,Ltd In order to ensure product quality, the production process of oil and casing is strictly controlled, and each oil and casing must go through the process of factory inspection
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2023-06-06Product News
Product requirements for J55 and K55 steel grade oil casing in API 5CT
Product requirements for API5CT standard J55 and K55 steel grade oil and casing
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2023-06-06Product News
Chemical composition of various steel grades of api 5ct oil casing
Chemical composition of various steel grades of api 5ct oil casing,Steel Grade:J55,K55,L80-1,N80Q,P110,Q125
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2023-06-06Product News
api ct petroleum tubing and casing Dimensions & Specificaitons
api ct petroleum tubing and casing Dimensions & Specificaitons
Description: tubing
Standard: APISPEC5CT, APISPEC5B, ISO11960
Uses: Tubing is used to extract oil or natural gas from oil wells.
Description: Oil Casing
Standard: APISPEC5CT, APISPEC5B, ISO11960
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2023-06-05Product News
Oil Casing Specification Table
According to SY/T6194-96 "Petroleum casing", it is divided into two types: short threaded casing and its coupling, and long threaded casing and its coupling.
Oil casing with special threads is mainly used in wells where traditional API threads are not suitable. Traditional API threads have problems such as sealing and tensile strength. Traditional API threads have poor gas sealing performance. For wells containing hydrogen sulfide, carbon dioxide and chloride ions It is not suitable for wells in different positions, and special threads can effectively overcome these shortcomings. In addition, some high-grade steel pipes (such as Q125 and above steel grades) generally use special threads.
